How do I transfer to Swift for an old Objective-C project

Create a new Swift project and delete the Storyboard file.

Then copy the Storyboard file of the Objective-C project, copy the.h and.m files (usually not appdelegate.h /.m), and put it in the new project

Copy-and-paste method is good, the code level is less involved

In the Swift project, when you use objective-C code, you use a bridge file

I’m also going to reference all the.h files and import them.

Replication is trivial

How to copy efficiently?

Script method is good
 find . -type f -name '*.h' -exec bash -c ' for result; do got=${result:2} printf "#import \"%q\"\n" "$got" done ' _ {} + | sort -n
Copy the code

You can copy it all at once

A brief explanation of the script:

 find . -type f -name '*.h' 
Copy the code

The text I found looks something like this

./AudioEngine.h
./InstrumentViewController.h
./MixerViewController.h
Copy the code

The processed text looks like this

#import "AudioEngine.h"
#import "AudioEngineViewController.h"
#import "AudioViewController.h"

Copy the code

Work with the source code later

Swift version upgrade tips,

Switch the Swift version number and follow the instructions all the way. It’s good

If rewritten, the long-ago, unsupported Swift project is relatively slower